Happiness and satisfaction comes from the knowledge that your life and work is having a positive impact and making a difference, however small or big. Actually there is nothing too small or too big to achieve in this universe. You are always manifesting and my gentle suggestion is to manifest with purpose. You will feel inspired as you work out your karma in this life as opposed to feeling drained and unmotivated if you stray too far from your manifest destiny.
Walk in your truth and live an authentic life.